where the radius of the circle is the measure Bust to Shoulder. But you don’t have to actually create all those arc points to make a circle.Instead, use the Line Distance point type. It finds a point that’s on a given line, a certain distance from a given point. There’s some trigonometry done for you when this runs. The dialog box goes

where I previously set up points CH and CH2 to define the “Shoulder Width” line. Note the “C-Clockwise” checkbox. This is for choosing which of the two possible intersection points (see the red circle above) is used.